Richland County's 2026 population is estimated at 10,896, reflecting a -0.6% growth rate over the past year (World Population Review estimate based on U.S. Census Bureau data). Richland County is the 20th largest county in Montana. The 2010 population was 9,760 and has grown 11.64% since 2010.
Data after 2023 is projected based on recent change
Overall: 38.4 years
Female: 37.9 years
Male: 39.2 years
There are 8,433 adults, (1,963 of whom are seniors) in Richland County.
Female: 5,523 (49.2%)
Male: 5,712 (50.8%)
The racial composition of Richland County includes 89.77% White, and smaller percentages for other race, Native Hawaiian or Pacific Islander, Asian, Black or African American, Native American and multiracial populations.
| Race | Population ↓ | Percentage (of total) |
|---|---|---|
| White | 10,086 | 89.77% |
| Two or more races | 758 | 6.75% |
| Other race | 228 | 2.03% |
| Native Hawaiian or Pacific Islander | 61 | 0.54% |
| Asian | 48 | 0.43% |
| Black or African American | 30 | 0.27% |
| Native American | 24 | 0.21% |
Richland County 's average per capita income is $47,541. Household income levels show a median of $73,084. The poverty rate stands at 6.6%.
| Name | Median ↓ | Mean |
|---|---|---|
| Married Families | $105,441 | - |
| Families | $91,563 | $119,227 |
| Households | $73,084 | $103,609 |
| Non Families | $46,071 | $73,394 |
Average Income
Median Household Income
Poverty Rate
